Although the smart transmitters have digital output, still they are calibrated often to ensure their proper working. Is that all? The following reasons also contribute to the need of regular calibration:

Most smart transmitters are exposed to harsh conditions. Thus, these instruments drift over the time.

As with other industries, the process industry have to fulfill regulatory requirements, such as safety, quality systems, environmental systems and standards, etc.

Accurate measurements always lead to appropriate decision making, which may bring various economic benefits.